Sugar-cane mill.



A. F EWART & S. TERRY.

SUGAR CANE MILL.

APPLICATION FILED NOV. I4. 1916.

Patented Nov. 12, 1918.

' 2 SETS-SH E T A. F. EWART & S. TERRY. v

SUGAR CANE MILL.

APPLICATION FILED 0 mm, 1916.

Patented NOV. 12, 1918.

2 SHEET$SHEET 2- ED s A'r srn ENT onnion ARTHUR rnnnmcn n'w'lmr AND SEYMDUR or no'aotum'r, TERRITORY or HAWAII.

SUGAR-CANE MILIJ.

Specification ortetter'si'a Patented Nov. 12, 191

Application filed Novem'be'rl, 1916'. Serial-No; 131,231.-

ments in Sugar-Cane Mills; and we do'hereby declare the following to be a full, clear,

and exact description of the invent-ion, such as will enable others skilled in" the art-towhich it appertains to make and use thesame;

This invention relates to sugar-cane mills having threecrushing rolls mounted in triangular relation, and particularly tothemeans for applying hydraulic pressure to the bearing of one of said rolls. IIIIIHllS Of'thG above type, owing to the fact" that thed-ischarge roll is set closer to" the top roll than the feed roll is to the top roll, a greater resultant pressure acts on aline drawn through the centers of the top roll and the" dischargeroll than on a line drawn through the centers of the top roll and thefeedroll.

This uneven pressure causes thetop roll bearing to tip and bindin-thepocket of -the housingin which it is mountedL Various means have been provided to overcometh1s binding tendency, butno'ne-of these m'eans Thehave been commercially successful. first step taken to relieve tliestrain' on thehousing of the mill was to-{insert a number under the mill bed, through which timber,-

the king bolts, which held the partsof the housing together, passed, which bolts also passedthrough the housing bed. Thetheory was that the timber would compress under the abnormal strains and the king bolts- Would take the tensile strain caused by: the

top roll shaft tending to lift, and would thus relieve any strain on-the housing itself.

Later the hydraulic j ack was provided andthis jack was located in the-place formerly occupied by the timber, as this was the most convenient place on the existing. style of mills.- The objection to this was thatthe mill as a whole was not of sufiicient strength,-

as the top cap was not rigid with the hous= ing. The next step ledto the provision-of a top cap which included the hydraulic jack.

packing in the hydraulic jack, and this, it

was--found,-took too much time tobecommer'ci'a'lly successful An attempt wasmade to overcomethe binding tendency of the bearing byi the formation of an inclinedhou-si-n g." With the use ofthe rigid-top'cap, a hydraulic jack appeared, which jack was adjustable on the top cap and about the centercfthe roll as apivot'. It-was found r to be-diflicult to adjust thejack on-the cap in this'arrangement, however.

provide'a cap whichii s rigid with the hous-h ing and an adjustable'hydraulic jackwhich will exert pressure on the rollbearing; at various points,;,so" asto overcomethe binding; tendency; between the bearing and; the housing; and thus permit the bearing to rise andfall withoutdifiiculty;

It isa'further objectof theinve'ntion to-v provide -a-capandjackwhich may be readily applied to-the mills of the-type that-'areat present commercially used, without necessitating-the"reconstructionof the housings.

It'is a-still further object of-;the inven tion' to so mount the jaclr within the-cap that 'the -cap; may be rigidly mounted-on the housingandyet thejack maybe readily removed therefrom when v desired, Without ne- I cessitating the removal or loosening of the Pr v t, a. a v

Astill further object of the invention resides-in the-provision ofajack and cap; which are so' constructedand; arranged that the jack may be readily adjusted between the; cap andthe' bearing without any considerable' difiiculty' and securely held in itsadjustedpo'sition;

While the drawing illustrates: the j ack as disposed between the topcap and the top roll,,- it; is evident and should be understood that the cap may be applied to either'th'e v frontor rear sides of the housing and the jackinterposed :between the cap soarranged I and either the feedor discharge roll-bearing.

Infthe drawing.-: v I

Eigurelis an elevation of a sugar-'canej mill showingthe cap applied tothe topof the h'ousingand the j ack interposed between the cap-and the bearing'of the toproll g' Fig. 2 is a vertical sectional view withparts-thereof broken away to show the Con struction of theram Fig. 3is anenlarged elevational View of therupper portion of the housing, the'cap, jack and roll bearing, construction lilies 5 It isan objectofthe present invention to Ill) being shown on this figure to indicate the movement of the jack so that it will apply pressure to the bearing to the sides of the center thereof; and

Fig. 4 is a horizontal sectional view.

In the drawing, the ordinary type of is housing 1 is illustrated, which includes side caps 3 and 4, a base 5, and is secured to a bed 6. Mounted on the upper end of the housing 1 is a. top cap 2 which is constructed in accordance with the present invention and which is provided with a recess 2. This top cap is secured to the housing by stay bolts 7 which pass completely through the cap, the housing, its base, and the bedpiece 6. A recess 3 is formed at the lower end of the cap and communicates with the recess 2 by means of an opening 4', which latter is substantia ly rectangular in form. Mounted in the housing 1, in the usual manner, are the front and rear rolls 10 and 11 and the top roll 12. This top roll is supported in the usual bearing 13 and includes upper and lower brasses. This bearing is movable vertically within the housing, as is necessary in mills of this type. If no means were provided for applying pressure to the upper brass of this hearing at various points, with relation to the center of the roll, the uneven pressure exerted between the discharge roll and the feed roll would cause the bearing to bind upon the housing, and thus it would not move freely and would subject the housing to undue strain. To overcome this objection, the invention provides means for applying pressure to the bearing 13 at various points with relation to the center of the roll. This means includes a hydrau ic jack comprising a cylinder l5 and a ram 16, in the lower portion of which cylinder, a socket 17 is formed. This ram comprises a body portion 18, a head 18, between which head and body portion, suitable packing material is arranged, as illustrated in Fig. 2 of the drawing. The upper end of the ram 16 bears against the adjacent face of the cap 2 and the diameter of the cylinder 15 is less than the width of the recess 2, so that the cylinder and ram may be moved laterally within the recess, the cylinder resting and movable upon a housing 16, which latter extends downward y through the opening 4: and is movable laterally therein, being of less width than the opening. Extending through the housing 16 is a follower 17 which extends into the recess 17 in the cylinder 15 and rests upon a suitable base 19, which base is movable laterally upon a plate 1 which is carried by the upper brass of the bearing 13 and is attached to the follower by means of a socket connection, as illustrated in dotted lines in Fig. 2. It will be seen with this arrangement of the jack that when the ram is relieved of hydraulic pressure, it may be 1,2 s nce? moved into the cylinder 15, at which time, the cylinder and ram may be lifted from the follower 17 and removed from the head. If desired, the follower may also be removed from the housing 16 and the base 19 removed from the plate 1 1, so that the entire jack may easily be removed from the cap without necessitating the loosening of the latter.

In order that the adjustment of the jack laterally of the recess 2 may be effected, and in order that it may he held in its various adjusted positions, the invention provides a pin 20 which is rotatably mounted within the head 2 and is provided on its inner end with an eccentric lug 21. This lug extends into a vertical elongated slot which is formed in the housing 16'. The outer end of the pin 20 is provided with a wrench hold 23, so that when the pin 20 is turned, the movement of the eccentric lug 21 within the slot 22 will cause the housing 16 to move laterally. This housing will carry with it, the jack, that is to say, the cylinder 15 and the ram 16, and also the base 19. Mounted rigidly on the wrench hold 23 is a disk 24: which is provided with an arcuate slot 25. Extending through this slot and in threaded engagement with the head 2 is a screw bolt 26 which has a washer interposed between its head and the disk 24. When this bolt is tightened, it will bind the disk against the head 2, and since this disk is rigid with the pin 20, the latter will be held in any particular position and will, in turn, hold the jack in its adjusted position. It will thus be seen that the jack may be adjusted laterally to exert pressure in direct line with the center of the top roll, or to either one side or the other thereof. In Fig. 3, of the drawing, the line which extends through the center of the roll is incheated by aa, while the center line of the jack is indicated by the line 5-6, the jack exerting pressure to one side of the center of the roll. The extent of the adjustment of the jack may be determined by a suitable indicator, such as illustrated in Fig. 3 of the drawing.

What We claim is 1. In a sugar cane mill, feed and discharge rolls, and a pressure roll mounted in a movable bearing, a hydraulic jack arranged toapply force to the pressure roll bearing, and means for adjusting the jack,

bodily, with respect to the aforementioned bearing.

2. In a sugar cane mill, feed and discharge rolls and a pressure roll movable to and away from the aforementioned rolls, and a jack adjustable to exert pressure on the pressure roll at various lateral locations with respect to the longitudinal axis of pressure roll.

3. In a sugar cane mill, a housing, a cap thereon, feed and discharge rolls and a pressure roll mounted in a bodily movable bearing, a jack mounted in said cap to apply force to the bearing of the adjacent roll and means active only when the jack is under pressure to prevent its removal from the cap.

4, In a sugar cane mill, a casing, three rolls arranged in triangular relation in said casing, one of said rolls beingbodilymovable, a cap on the casing, a jack mounted in the cap and arranged to apply force to the bearing of the movable roll, and means for adjusting the jack relative to the bearing and within the cap.

5. In a sugar-cane mill having three rolls disposed in triangular relation Within a housing, a cap fixed to the housing and having a recess therein, a jack including a cyl inder and a ram located in said recess, a base resting upon the bearing of the adjacent roll, a follower extending between the base and the cylinder, said jack, base and follower being removable from the cap and adjustable laterally with relation to the hearing.

In testimony whereof We afiix our signatures.

ARTHUR FREDRICK EWART. SEYMOUR TERRY.

Copies of thin patent may be obtained for five cents each, by addressing the "Commissioner of ratentl,

a Washington, D. G." Y 

